Controlling the optical properties of gold nanoparticles periodic arrays by changing their topologic shapes and substrate properties
We investigated the influence of extinction of gold nanoparticles periodic arrays by varying the substrate properties and the shapes of nanoparticles with the full vectorial three dimensional finite difference time domain method. Substrates of different thicknesses and dielectric constants and ten topologically different gold nanostructures including diamond, cycle ring, rectangle ring, pentagon ring, five-pointed star, flower shape, L, Y, T and X shapes are considered. The results show that substrate properties have a significant impact on the extinction spectrum due to coupling of the modes excited in substrates and the one excited by localized surface plasmon. The extinction spectra are changed with the different shapes of nanoparticles periodic array. However, with similar structure particles periodic arrays, the extinction spectra appear similar in the visible regime. Therefore we can find an eligible shape and substrate which can be used in integrated devises.
extinction spectra gold nanoparticles substrate properties topologic shape
LI Ting YU Li LU Zhi-Xin SONG Gang LIU Bin
School of Science, Beijing University of Posts and Telecommunications, Beijing,China
国际会议
3rd International Photonics & OptoElectronics Meetings(第三届国际光子与光电子学会议 POEM 2010)
武汉
英文
1-9
2010-11-03（万方平台首次上网日期，不代表论文的发表时间）